<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>web</title>
		<script type="text/javascript">
			var n1=1;
			var n2=5;
			do{
				alert(n1>n2);
			}while(n1>n2)


// 			while(n1<n2){
// 				alert("哈哈哈")
// 			}
		</script>
	</head>
	<body>
		
	</body>
</html>